World Health Organization cancer prevention rules 15 1, do not eat moldy food and its products. When peanuts, soybeans, rice, flour and vegetable oil are moldy, they can produce Aspergillus flavus, which is a strong carcinogenic substance. 2, eat less smoked or pickled food, such as bacon, salted meat, salted fish, pickled sauerkraut, pickled vegetables, etc., because these foods can produce a carcinogenic substance – amyl nitrite. 3.Do not drink alcohol, especially not strong alcohol. Because wine produces a variety of carcinogenic substances in the production process, and alcohol can directly stimulate the mouth, tongue, esophagus, stomach and intestinal mucosa, which may cause cancer. 4, do not smoke, smoke inhalation in the airways and lungs, 50,000 times more harmful than air pollution, smoke has a variety of carcinogenic substances. 5, do not touch or less contact with the black smoke coming out of the chimney, the air polluted by it contains a small amount of carcinogenic substances. 6.Do not eat vegetables, fruits and other things contaminated by pesticides, and wash them well before eating. 7.Do not use washing powder to scrub dishes, tea sets or wash food, as washing powder can promote the development of cancer. 8.Do not use toxic plastic film to package food or use toxic plastic products to hold food. Because polyvinyl chloride is a carcinogenic substance. 9.Don’t over-sunbathe. There are strong ultraviolet rays in the sun, and prolonged sun exposure has carcinogenic effect on the skin. 10.Do not eat too hot, too hard, burnt or too salty food and do not drink too hot water. It can stimulate the epithelial cells of gastric mucosa and destroy the protective effect of mucosal barrier, which can give cancer a chance to take advantage of. 11.Smoking and drinking together can greatly increase the chance of cancer. 12.Eat more fresh vegetables, don’t eat too much, control meat and don’t be too fat, which can reduce the incidence of cancer. 13.Don’t often take drugs that may cause cancer, such as hormone drugs and high doses of vitamins. These drugs can reduce the immunity of people and give a chance for cancer to develop. 14.Women with celiac disease should have regular checkups and timely treatment to prevent cancer. 15.Adults or children with overgrown penis should be removed in time and ring cut to prevent penile cancer.